441 citations · 2.2k across the 21 of their papers we have counts for
22 papers
Dissipating quartets of excitations in a superconducting circuit
Aron Vanselow, Brieuc Beauseigneur, Louis Lattier +5
Over the past decade, autonomous stabilization of bosonic qubits has emerged as a promising approach for hardware-efficient protection of quantum information. However, applying the…
Quantum control of a cat-qubit with bit-flip times exceeding ten seconds
Ulysse Réglade, Adrien Bocquet, Ronan Gautier +14
Quantum bits (qubits) are prone to several types of errors due to uncontrolled interactions with their environment. Common strategies to correct these errors are based on architect…
Stability and decoherence rates of a GKP qubit protected by dissipation
Lev-Arcady Sellem, Rémi Robin, Philippe Campagne-Ibarcq +1
We analyze an experimentally accessible Lindblad master equation for a quantum harmonic oscillator. It approximately stabilizes finite-energy periodic grid states called Gottesman-…
Robust suppression of noise propagation in GKP error-correction
Christian Siegele, Philippe Campagne-Ibarcq
Straightforward logical operations contrasting with complex state preparation are the hallmarks of the bosonic encoding proposed by Gottesman, Kitaev and Preskill (GKP). The recent…
Exponential convergence of a dissipative quantum system towards finite-energy grid states of an oscillator
Lev-Arcady Sellem, Philippe Campagne-Ibarcq, Mazyar Mirrahimi +2
Based on the stabilizer formalism underlying Quantum Error Correction (QEC), the design of an original Lindblad master equation for the density operator of a quantum harmonic oscil…
Determining the position of a single spin relative to a metallic nanowire
J. F. da Silva Barbosa, M. Lee, P. Campagne-Ibarcq +9
The nanoscale localization of individual paramagnetic defects near an electrical circuit is an important step for realizing hybrid quantum devices with strong spin-microwave photon…
Magnifying quantum phase fluctuations with Cooper-pair pairing
W. C. Smith, M. Villiers, A. Marquet +6
Remarkably, complex assemblies of superconducting wires, electrodes, and Josephson junctions are compactly described by a handful of collective phase degrees of freedom that behave…
Quantum error correction of a qubit encoded in grid states of an oscillator
P. Campagne-Ibarcq, A. Eickbusch, S. Touzard +10
Quantum bits are more robust to noise when they are encoded non-locally. In such an encoding, errors affecting the underlying physical system can then be detected and corrected bef…
Stabilized Cat in Driven Nonlinear Cavity: A Fault-Tolerant Error Syndrome Detector
Shruti Puri, Alexander Grimm, Philippe Campagne-Ibarcq +7
In quantum error correction, information is encoded in a high-dimensional system to protect it from the environment. A crucial step is to use natural, low-weight operations with an…
Cavity Attenuators for Superconducting Qubits
Z. Wang, S. Shankar, Z. K. Minev +3
Dephasing induced by residual thermal photons in the readout resonator is a leading factor limiting the coherence times of qubits in the circuit QED architecture. This residual the…
Deterministic remote entanglement of superconducting circuits through microwave two-photon transitions
P. Campagne-Ibarcq, E. Zalys-Geller, A. Narla +8
Large-scale quantum information processing networks will most probably require the entanglement of distant systems that do not interact directly. This can be done by performing ent…
On-demand quantum state transfer and entanglement between remote microwave cavity memories
Christopher Axline, Luke Burkhart, Wolfgang Pfaff +9
Modular quantum computing architectures require fast and efficient distribution of quantum information through propagating signals. Here we report rapid, on-demand quantum state tr…
Inductive-detection electron-spin resonance spectroscopy with spins sensitivity
S. Probst, A. Bienfait, P. Campagne-Ibarcq +10
We report electron spin resonance spectroscopy measurements performed at millikelvin temperatures in a custom-built spectrometer comprising a superconducting micro-resonator at …
Observing a quantum Maxwell demon at work
N. Cottet, S. Jezouin, L. Bretheau +7
In apparent contradiction to the laws of thermodynamics, Maxwell's demon is able to cyclically extract work from a system in contact with a thermal bath exploiting the information…
Magnetic resonance with squeezed microwaves
A. Bienfait, P. Campagne-Ibarcq, A. Holm-Kiilerich +9
Vacuum fluctuations of the electromagnetic field set a fundamental limit to the sensitivity of a variety of measurements, including magnetic resonance spectroscopy. We report the u…
Using Spontaneous Emission of a Qubit as a Resource for Feedback Control
P. Campagne-Ibarcq, S. Jezouin, N. Cottet +6
Persistent control of a transmon qubit is performed by a feedback protocol based on continuous heterodyne measurement of its fluorescence. By driving the qubit and cavity with micr…
Quantum state tomography with non-instantaneous measurements, imperfections and decoherence
Pierre Six, Philippe Campagne-Ibarcq, Igor Dotsenko +3
Tomography of a quantum state is usually based on positive operator-valued measure (POVM) and on their experimental statistics. Among the available reconstructions, the maximum-lik…
Quantum dynamics of an electromagnetic mode that cannot contain N photons
Landry Bretheau, Philippe Campagne-Ibarcq, Emmanuel Flurin +2
Electromagnetic modes are instrumental in building quantum machines. In this experiment, we introduce a method to manipulate these modes by effectively controlling their phase spac…
Parameter estimation from measurements along quantum trajectories
Pierre Six, Philippe Campagne-Ibarcq, Landry Bretheau +2
The dynamics of many open quantum systems are described by stochastic master equations. In the discrete-time case, we recall the structure of the derived quantum filter governing t…
Observing interferences between past and future quantum states in resonance fluorescence
Philippe Campagne-Ibarcq, Landry Bretheau, Emmanuel Flurin +3
In quantum physics, measurement results are random but their statistics can be predicted assuming some knowledge about the system in the past. Additional knowledge from a future me…
Persistent control of a superconducting qubit by stroboscopic measurement feedback
Philippe Campagne-Ibarcq, Emmanuel Flurin, Nicolas Roch +6
Making a system state follow a prescribed trajectory despite fluctuations and errors commonly consists in monitoring an observable (temperature, blood-glucose level...) and reactin…
Widely tunable, non-degenerate three-wave mixing microwave device operating near the quantum limit
Nicolas Roch, Emmanuel Flurin, François Nguyen +4
We present the first experimental realization of a widely frequency tunable, non-degenerate three-wave mixing device for quantum signals at GHz frequency. It is based on a new supe…